Building an Extensible Multi-Level Transporter

• First was the Display Class.
  • This is a component so we can discuss composition.
  • It also allowed introduction of the TextRender widget
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• The Giver class was constructed next.
  • This will "give" or add a level to the transporter.
  • This assumes that there is only one transporter in the level.
  • It has a local variable, LevelName
    • of type name
    • This is exposed, so it can be set by scene builders.
  • It also has a ChildActor
  • These can be created as described here
  • This was a BP_Display
  • It needed to set the proper value in the display in the construction script.
  • 
  • On overlap, it attempts to add it's level to the list of destinations for the transporter
  • 
  • Notice this calls member functions
    • Elevator.AddLevelName(LevelName)
    • Display.NewMessage(LevelName)
  • There should probably be some logic here to prevent it from giving the name multiple times.
  • And perhaps it should be more strongly tied to the elevator.
• The transporter class
  • This has
    • A child Actor (Display)
    • An array of names (Levels), available to the outside world
    • An integer destination.
  • There is a major problem with this as it is reset each time we reenter the level.
    • We demonstrated this in the end of class.
    • We will fix this later.
  • The function DisplayDestination is responsible for updating the display
    • 
  • This is called in the constructor.
    • 
  • Function AddLevelName allows external items to add a new level
    • This takes a level name as a parameter.
    • And shows Unreal's AddUnique function
    • 
    • This was called from the Giver
  • The function NextDestination
    • Increments the destination counter.
    • And wraps it back to 0 when needed.
    • It also sets the display to the new destination
    • 
    • Finally, on an overlap, the user is transported.
    • 
• The last item was a BP_DestSwitch
  • This is responsible for changing the destination of the transporter
  • Again, it works on the first transporter found.
  • It has a single operation
  •